You want to do this so that when you change the parameter values of your simulation (like with your wedges), you do not also have to recook its source geometry. This node will cache out the initial smoke point for the pyro sim and decouple the source geometry from the simulation. The source geometry is what will emit the smoke in your scene. In this step you will use a ROP Geometry Output TOP node to cache out the pyro simulation’s input or source geometry for each wedge variation. Select the smoke_variations node and then configure or wedge out the force and size attributes: The parameters on the Wedge node will build up percentages of attributes to change and define the number of wedges to generate.įor this tutorial, you will define a set of four different configurations for the pyro sim that will vary the force that is applied to the smoke and the size of the smoke source. In the TOPs ⇥ Tab menu, you can find Wedge in the Data category. In the Network Editor, navigate to the Tasks context and then dive into the topnet1 network.Ĭreate a Wedge node and then rename it to smoke_variations. Run Houdini and open the fxtutorial.hip tutorial scene file.

This will allow you generate and compare variations of your smoke later on in the tutorial. In the first step of this tutorial you will use a Wedge TOP node to set-up a series of variations for the downstream pyro simulation (smoke) by defining the set of attributes to create variations of and the number of variations to create.

Pyrosim tutorial